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Hi Everyone,
My latest virtual anatomy project is now finished. Here's a still frame:  ... and here's the movie: http://www.warpax.com/temp/forelimb-tl.avi (14 MB, 720x304px, DivX compatible, 4 mins long) Edit: Removed one of the download locations which was too slow. The bone models were digitized from real bones photographically using BLIX (blix.sourceforge.net) and are Blender subdiv surface models. The tendons were created by hand based on dissection observations, with their cross-section shapes and dimensions taken from sparsely-distributed MRI scan images. The animation was exported from Blender to RenderMan RIB format using my custom exporter. It was rendered using Aqsis, with 64-light shadow-mapped Ambient Occlusion (which is different to Blender's AO, but a similar concept), motion blur, and a Catmull-Rom pixel filter. Unfortunately, Aqsis also introduced artifacts into the subdiv surfaces, especially around the creases, and some patch cracks. Render time was about 12 computer-days, with frames taking an average of 3 minutes to render (compare with at least 8 minutes per frame for Blender's AO with motion blur of a similar quality). If Aqsis still has the subdiv crease problems by the time I'm working on my next project of this sort, then I might give Pixie a go. So, is it clear enough what all the bits are? 8) Jonathan Merritt. |
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#1
22-Mar-05, 13:06
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download time is one hour :-?
I've downloaded another movie and his download time was 3 minutes %|
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www.vfxjob.nl |
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#2
22-Mar-05, 13:57
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Blix, ye say?
Will definitely be delving into that and seeing how it works. At work just now so I am gonna grab the video when I get home. It looks like it will be interesting though. (Seperate post regarding Blix perhaps? I never noticed anything about it before now) Chimpoid |
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#3
22-Mar-05, 15:03
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So, why the choice of an external renderer? Why did you not use blender or yafray? Just wondering...
BTW, you're gonna get a bunch of request for the RIB exporter, so you might as well go ahead and post it now... 
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- mzungu The agnostic dislexic insomniac: lies awake in bed at night wondering if there really is a dog. |
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#4
22-Mar-05, 18:04
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Quote:
I watched your video and everything seemed pretty clear (except the problems you yourself mentioned). GreyBeard |
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#5
22-Mar-05, 18:53
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Hi Everyone,
Quote:
I will release the NMesh wrapper and the camera eventually. However, I am working on some cool stuff with them that I need at the moment (such as hooks to allow texture baking, etc.). I'd say that anyone using them should be technically competent enough to fill in the remaining blanks. I chose an external renderer because I wanted: 1. Motion blur (the overall quality drops substantially without it). 2. Ambient occlusion (although I'd change my settings if I had the chance! - the lighting is waaaaay too flat!). 3. Decent render times. Note that the animation required rendering 6600 frames, in 1 week, on 3 "relatively" old machines (3-7 years old). That's certainly not a project for Yafray (!!!), and even Blender would have trouble. As I mentioned, the render time per frame using Aqsis was about 3 mins. One of the beautiful things about RenderMan renderers is that there are many speed / quality tradeoffs that work orthogonally. This means that it is much easier to tweak render settings than it is in Blender. Aside from the nasty subdiv surface artifacts from Aqsis (which will be fixed soon!), it all worked very well. Quote:
Quote:
 Jonathan Merritt. |
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#6
24-Mar-05, 08:27
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